Russian troops are inching towards the city of Kostiantynivka in Ukraine’s eastern Donetsk region, trying to establish a foothold close to a heavily defended area, Ukraine’s top army official said on Saturday. Kostiantynivka, along with other cities, forms a so-called fortress belt in the country’s east – an area well fortified by the Ukrainian military. Ukraine’s army chief, Oleksandr Syrskyi, said on the Telegram app that ‘counter-sabotage measures’ were being undertaken in the city. A Ukrainian battlefield mapping project called DeepState shows that Russian troops control an area about one kilometre (0.6 mile) from the city’s southern outskirts. Russia’s Defence Ministry said on Wednesday its forces had taken control of Novodmytrivka, just north of Kostiantynivka.

On Saturday, Russia’s Defence Ministry said it had seized the village of Myropillia in Ukraine’s northern Sumy region, where Moscow says it wants to establish a buffer zone. But the Kursk group of the Ukrainian military, writing on Facebook, dismissed the Russian report as a “complete lie” and said its units controlled the area. Also in Sumy, the regional governor said a Russian airstrike near the town of Krovelets had injured six people, including two in serious condition.

Two people were killed and seven wounded after a Russian drone attacked a minibus in the southern Ukrainian city of Kherson, local officials said Saturday, in the latest round of attacks on civilians across Ukraine. Hours later Russia attacked another minibus in Kherson, wounding the driver, said regional head Oleskandr Prokudin. On Ukraine’s Black Sea coast, a Russian strike damaged port infrastructure in the city of Odesa but no casualties were reported.

In a blow to Berlin, which had pushed for the move as a powerful deterrent against Russia, a planned drawdown of 5,000 US troops from Germany includes a Biden-era plan to deploy a US battalion with long-range Tomahawk missiles to Germany. The US plan should spur Europe to strengthen its own defences, German defence minister Boris Pistorius said on Saturday, but two top US Republican lawmakers expressed concern, saying the troops should not leave Europe.

North Korean leader Kim Jong-un met delegates to the ruling party’s youth league congress in Pyongyang, state media KCNA said on Sunday, as the North Korean government has again cast young people as central to both domestic mobilisation and its military role in Russia’s war against Ukraine. The Eleventh Congress of the Socialist Patriotic Youth League is a once-in-five-years political gathering aimed at mobilising citizens aged roughly 14 to 30. In a letter published on Friday, the ruling Workers’ Party explicitly linked youth loyalty to Pyongyang’s involvement in the Ukraine war, telling the congress that young soldiers sent on overseas operations had “become bombs and flames” in defending the country’s honour. North Korea sent an estimated 14,000 troops to fight alongside Russian forces in the Kursk region, according to South Korean, Ukrainian and western officials.